Final answer:
The purpose of splitting the dataset into X and y is to separate out the independent and dependent variables.
Step-by-step explanation:
The purpose of splitting the dataset into X and y is to separate out the independent and dependent variables. The independent variable, also known as the predictor variable, is the variable that is controlled or manipulated. It is represented by the X data. The dependent variable, also known as the response variable, is the variable that changes with or depends on the value of the independent variable. It is represented by the y data. By splitting the dataset into X and y, we can analyze the relationship between the variables and build models to predict the value of the dependent variable based on the independent variable.